The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2001
Filed:
Jan. 03, 2000
Richard Furneaux Kinnersly, Romsey, GB;
Sustainable Engine Systems Ltd., London, GB;
Abstract
A Stirling cycle machine has a piston (,) which reciprocates in a cylinder (,) and defines a hot chamber (,) between the piston (,) and end of cylinder (,). Heat exchange for the working fluid in the hot chamber (,) is effected while the working fluid is outside the hot chamber (,) in a flow path (,) communicating with that chamber (,). The piston (,) has a concave crown forming a surface (,) of the hot chamber (,). A seal is provided by a land (,) of larger diameter than the general diameter of the piston (,) formed around the upper periphery of the piston (,) and at least one annular groove (,) formed in the land (,) to disrupt free flow of working fluid along the gap between the land (,) and the cylinder wall.